Objective To improve the performance of lithium-sulfur batteries， the effect of surface modification of three-dimensional porous graphene on lithium-sulfur batteries was investigated.Method Using graphene oxide as the raw material， three-dimensional porous reduced graphene oxide was synthesized via a hydrothermal method combined with a hard template pore-forming process. Sulfur-based cathode materials were prepared by the thermal melting diffusion method. The lithium ion diffusion characteristics were analyzed by cyclic voltammetry， the binding capacity of lithium polysulfides was evaluated through adsorption experiments， and the material performance was verified by cycle performance tests at different current rates.Result An ultra-thin and dense modification layer with no obvious cracks was formed on the surface of three-dimensional porous graphene. Furthermore， the modified three-dimensional porous graphene could effectively suppress the shuttle of lithium polysulfides. It delivered an average specific capacity of approximately 351.6 mAh/g at an ultra-high current rate with an extremely low capacity decay rate of 0.013%， which was significantly superior to the control materials.Conclusion Surface modification of three-dimensional porous graphene can enhance the binding of lithium polysulfides through a physical barrier and thus effectively inhibit the shuttle effect of lithium polysulfides in lithium-sulfur batteries.